One thing I think about whenever I sit in a tram waiting for cars that shouldn’t be holding up the tram to stop holding up the tram is that trams should have a video cam on them and drivers could have a button that either activates the cam or marks the spot at which it is running and if the car was breaking the road rules it gets a ticket. Improves efficiency and brings in a bit of revenue. What’s there not to like. Anyway, the same idea has been proposed various times in the past but has never managed to be implemented. I don’t know why. But as is so often the case, technology’s capacity to decentralise these decisions is leading the way – with bicycle cams as illustrated above. Handy in court cases.